Writer-director Rashaad Ernesto Green tells us about why he set his film “Gun Hill Road” in the Bronx, finding a transgender actress to play the teen, how anyone who has ever been a teenager should be able to identify with the film, and the power of art.

Mark Hopkins, the director of the new documentary “Living in Emergency,” about the international humanitarian organization Médecins Sans Frontières—Doctors Without Borders—compares the group to the Special Forces. Not many people get accepted to the program, and of those who are, few go on to do a second mission.